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Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).click here to download the app (for users in the US for now) and get all the help you need. Good luck!

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Lastly the diaphragm Item 34 page 10 for tears or pin holes.
These are the 3 most common reasons that cause the symptom your having. There is a repair kit (Item 19) to rebuild this carb but does not include item 13
13 12538108660 1 BULB, PURGE Make sure you change the Bulb if you do a rebuild.

Most likely the TV has a power supply related problem. It's possible that it maybe a bad capacitor or transformer on the power supply board.The best thing that would help you is a Service Manual. It will give you red light blinking codes, circuit diagrams, schematics, test points, and part# lists. It will help you diagnose the source of the problem and fix it by soldering in the new part. And most cases the new part cost less than $15 by searching on the internet with the part number.
The Service Manual usually cost under $20 over the internet. Nodevice.com, Eserviceinfo.com, and Servicemanuals.net. If anybody had it, they would. If they don't have one for your TV, you can send a request for the Service Manual under your model number.
It's the best thing you can use to repair the TV.
I hope I shed some light on the subject for you.

Error code 13 is "oxygen depletion sensor" activated.
The first number is a sequence indicator.
If you need the training manual I have it and can send it to you.
I got Rheem to send it to me a while back and it is a big help when working with these units.
It covers th RTG-42, 53, 66 and 74.

After 13 years, the most likely cause is a tired picture tube. There are adjustments that can be made to address this, but they would be short lived. Rather than spend money on this set, put it toward a replacement. After 13 years, the set owes you nothing.

Hi. I'm afraid this is not a 'basic requirement' of a cash register. You are working with a very complicated area of cash registers that only the medium to high end machines can even do. If you are getting stuck already, then you will not be able to work out the more complex batch processing areas of scanning either. Your dealer should have setup the majority of this for you before you left their store (especially the keyboard layout issue and keysheet for the keyboard), then you would normally receive extensive training if you are going to be making program changes yourself in future. You will need to learn about the difference between flat PLUs and scanning PLUs, 'Not found PLUs' like you have run into so far, then deletion techniques, PLU status programming, manual entry using OBR method etc. The book is only a guide to what you should have learnt during training. You really need to go back to the dealer and get a training session. They should be able to sort out all of these problems for you. It will take a one on one demo to fully train the ins and outs of full scanning systems.

Pretty much a hoax on those diverter boxes. People ran out and bought them thinking that won't have reception. I have many years in maintenance and several years in nursing homes with different tv's in every room. Not once have I needed a box to pick up channels with or without cable. I myself get 16 channels with rabbit ears and thats enough for me. And I do own a combo as well and it has simple antenna and does me just fine. Depending on your location, the old tv antennas we use to put on our houses...they work amazing! Might be able to snag one on a freecycle or craigslist site. Good luck! :)

Quasar is owned by Matsushita corporation who also owns Panasonic, National, Technics and Ramsa... Technically Panasonic owns Quasar as a sub-division and Matsushita owns Panasonic... In lesser terms you should be able to contact Panasonic customer service for the owners manual or any information...
Bill